Problems · by component

2010 Mercury Mariner Hybrid power train problems

62 owner complaints to NHTSA about the 2010 Mercury Mariner Hybrid cite power train, 22% of all 279 complaints for this model year.

Complaints
62
22% of all complaints
Crashes
0
Reported by owners
Fires
1
Reported by owners
Injuries
0
Reported by owners
01 —Owner reports

What owners say about the power train

Verbatim from NHTSA complaints, newest first
“I was driving when it felt like the vehicle was reving in park then the "wrench" icon appeared on my dash. I went a couple blocks & my vehicle felt like it wasn't shifting automatically as it should. I pulled over & turned it off. It started right back up with no lights on, I went half a block & stopped at a stop sign but while stopped the engine reved up. I was worried I was going to be in an accident. Then the "wrench" light came back on, since I was close to home I figured I'd just try to get home. About another block, the check engine light came on & was making strange noises. I kept my vehicle at about 5-10 mph & got it home. My car was very jerky.”
Owner complaint to NHTSAFiled Aug 13, 2021Power train, EngineODI 11429049
“TL* THE CONTACT OWNS A 2010 MERCURY MARINER WHICH WAS BEING TOWED BY A 2004 FLEETWOOD TIOGA MONTARA. WHILE DRIVING APPROXIMATELY 60 MPH, THE CONTACT NOTICED SMOKE COMING FROM THE HOOD. THE MOTOR HOME WAS PULLED OVER, THE CONTACT OPENED THE HOOD, AND NOTICED THAT THE TRANSMISSION OVERHEATED WITHOUT WARNING. THE VEHICLE WAS TAKEN TO CHUCK COLVIN FORD NISSAN (1925 N HWY 99 W, MCMINNVILLE, OR 97128, 503-472-6124), BUT WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND STATED THAT THE FAILURE WAS A KNOWN OCCURRENCE WITH THE TRANSMISSION AT APPROXIMATELY 50,000 MILES. THE FAILURE MILEAGE WAS APPROXIMATELY 56,000. *TT”
Owner complaint to NHTSAFiled Jul 23, 2018Power trainFire reportedODI 11113079
“I WAS DRIVING MY 2010 MERCURY MARINER , WHEN THE ENGINE LITE CAME ON WITH A LITTLE WRENCH LITE. MY CAR STARTED TO LOSE POWER AND I COULD NOT GET IT TO PICK UP POWER. I PULLED OF THE ROAD. I TURNED OFF MY CAR, I DIDN'T KNOW IF IT WOULD START AGAIN .VERY SCARY.I HAVE ONLY 86000 MILE ON IT .”
Owner complaint to NHTSAFiled Sep 30, 2017Power trainODI 11030677
“I WAS DRIVING AT 65+ MPH ON EXPRESSWAY - VEHICLE STOPPED ACCELERATING AND A VIOLENT SHAKING OF THE VEHICLE OCCURRED FORCING ME OFF THE HIGHWAY - AT THIS TIME NOTICE AN IMAGE OF A "WRENCH" LIT UP ON DASH -- I WAS ABLE TO GET VEHICLE TO THE DEALER - NOT WORRIED DUE TO I STILL HAD 2000 MILES LEFT ON WARRANTY, ONLY TO BE TOLD THIS IS NOT COVERED UNDER WARRANTY. MY QUESTION IS THIS IS HUGE SAFETY ISSUE AND SHOULD UNDER NO QUESTIONS BE A CHARGE TO THE CONSUMER. I WAS CHARGED 309.20 TO REPLACE THE THROTTLE BODY MOTOR AND ASSEMBLY. AFTER MUCH RESEARCH THIS IS AN ONGOING PROBLEM WITH MANY OF THE FORD VEHICLES. ATTACHED IS THE INVOICE THAT I HAD TO PAY. I HAVE TRIED TO OBTAIN THE ZONE REP FOR MY AREA AND I AM HAVING TROUBLE GETTING THIS INFO FROM MY DEALER. I AM STILL INVESTIGATING AS TO HOW TO OBTAIN THIS INFO AS I BELIEVE SOMEONE IN HIGHER POSITION THEN DEALER NEEDS TO BE AWARE.”
Owner complaint to NHTSAFiled Sep 21, 2017Power trainODI 11024779
“CAR STOPPED RUNNING WRENCH LIGHT CAME ON STARTED MOTOR PUT IT IN GEAR TRIED TO GO REGULAR PACE CAR DID NOT GO IT IS VERY SLOW NO GAS PEDDLE TURNED IT OFF LET SET FOR 2 HRS. STARTED BACK UP RUNS OK BUT CHECK ENG. LITE CAME ON CALLED DEALER”
Owner complaint to NHTSAFiled Jun 22, 2017Power train, Unknown or other, EngineODI 11000721
“CHECK ENGINE WRENCH CAME ON VEHICLE BEGAN TO LOOSE POWER. GAYLORD FORD FOUND NO RECALL BECAUSE THE CAR WAS BUILD AUGUST 2009 IN THE SAME PLANT AS OTHER VEHICLES WITH THE PROBLEM WITH THE THROTTLE SENSOR FOR POWERTRAIN. THE VEHICLE LOST POWER AND WOULD ONLY GO 30 MPH. CAR IS A 2010 MILAN HYBRID 133,000 MILES.”
Owner complaint to NHTSAFiled Jun 16, 2017Power trainODI 10995547

Showing 6 of 62 reports. Read every report on NHTSA.gov.

Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026NHTSA vehicle page

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.